Computing-machine



G. -BROWNING'. COMPUTING MACHINE.

APPLICATION FILED MAY 24, I919.

1,360,09 1 Patented Nov. 23, 1920.

4 SHEETS-SHEET I.

G. BROWNING.

COMPUTING MACHINE.

APPLICATION FILED MAY 24. I919.

Patented NOV. 23, 1920.

4 SHEETS-SHEET 2.

G.. BROWNING.

COMPUTING MACHINE.

APPLICATION FILED MAY 24. 1919.

1,360,091 Patented Nov. 23, 1920.

4 SHEETS-SHEET 3.

\\\\\\\\\\\\ VIII G. BROWNING.

COMPUTING MACHINE.

APPLICATION FILED MAY 24. 1919.

Patented Nov. 23,1920.

4 SHEETS-SHEET 4.

UNETED STATES GEORGE BROWNING, OF CHICAGO, ILLINOIS.

COMPUTING-MACHINE.

Application filed May 24, 1919.

To all whom it may concern Be it known that l, Gnonon BROWNING, a subject of the King of (neat Britain, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Computing- Machines, of which the following a specn iication, reference beinglnid to the accom panying drawings, forming a part thereoi.

The purpose of this invention is to provide an improved key-opei ed mechanism .t'or adding machines and the like, ior pen forming aritlnnetica processes or which the result is to be visually indicated by the device, but not recorded, though such recording is not inconsistent with the invention. t consists in the elements and features of construction shown and described as indicated in the claims.

in the drawings: I

Figure l is a partly sectional trout elevation of an incased structure embodying this invention, section being made aizially the line, 1-4 on 2, and certain parts being broken away at dilierent positions in the length. W

Fig. 2 is a section at the line, 2-2 on r 1g. 1, being at a trans-axial plane between two consecutive mechanisms of which the entire structure comprises as many as the number of columns within the capacity of the machine; the casing and end standards beinc: omitted and the movable parts being hi rest-position, and the operating keys not being shown.

Fig. 3 is a view similar to Fig. but phowing the keys and the end standards, and with certain plate broken away, disclosing parts which are concealed in Fig. 2, the movable parts being shown a different position from that of 2.

Fig. 4 is a section at the line, ele'-, on Fig. l, certain parts being broken away.

5 is a section at the line, on Fig. 1. r

Fig. 6 is a right-hand end elevation, having the casing and right hand standard in part broken away to disclose interior parts.

Fig. 7 is a section at the line, 7---7. on F1 1, with certain parts broken away.

Fig. 8 is a section at the line, 8-8, on Fig. 3.

The instrument described comprises a plurality of individual column adding mechanisms, A, mounted side by side on a common shaft, 1, which is supported in Specification of Letters Patent.

Patented Nov. 23,1'92Q.

sci-m1 No. 299,414.

fixed end standards, 2, 2, which are rigidly secured together by said shaft, well as other means hereinafter more particularly pointed out. Each of said mechanisms con1- prises a carrier, l, having a hub, 4, which is journaled on the shaft, 1, and a lined plate, 5, which is rendered fixed by being cen tered on the hub, l, about the shaft, 1, and secured at its periphery to a multiple rod, 3, which extends rigidly om stain r to standard and constitutes part oi the means of connecting the standards rigidly together. These several adding mechanisms are practically alike and a descrip tion of one of them will sufiice for all. On the carrier, at a numeral wheel, (3, is mounted so as to be carried with the carrier in its rocking movement about the shaft, 1, and. so as to be rotated about its own axis on the carrier. This numeral wheel a short cylinder having on its periphery two series of numerals from zero to nine, said periphery being subdivided into spaces each here inatter called a unit space or unit step. Rigid and concentric with the numeral wheel on one side of it is a pinion, 7, having twenty teeth, and on the opposite side. a. ratchet cam disk or plate, 8, having at diametrically opposite points, alined longitudinally of the cylinder with the zero spaces of the periphery, two cam-ratchet teeth, 8. it shield flange or face plate, 10, curved circularly about the axis of the carrier and rigid with it, extends through nearly threequarters of the circle about said axis, encompassing the numeral wheel and having :2 reading aperture, 10, in position radial with respect to the axis'of the numeral wheel. ()n the hub, l of the carrier there is cur naleo a master gear, 11, having a hub, 11 telescoped on the hub, 4, of the plate, 4, said master gear being meshed with the pinion, 7. The mode or" operation of the device involves the rotation of the pinion and numeral wheel when the carrier is rocked about its axis, which is the axis of the master gear, while the master gear is held fixed; and the extent of rotation at each rocking of the carrier to carry the pinion around the master gear, is to be determined according to the number to be added, by individually key-operated parts which are intruded into the path of the mechanism on the carrier to cause the locking of the master to the support or to the carrier, that is, so that when fixed to the support it will cause the pinion and numeral wheel to rotate, and when released from the support and locked to the carrier, it will carry the numeral. wheel with the pinion and willnot rotate it.

The mechanisms for these purposes and others incidentally performed will now be described in detail.

13 is a locking dog whose head, 13, engages between the teeth of the pinion, 7, said head being about right-angular in form at the end which enters between the pinion teeth, so that the pinion can be forced in either direction notwithstanding said engageme-nt, unless the dog is positively held in such engagement. A spring, 1%, connected to a lever arm, 13, of the dog, 13, and to a fixed stud, 15, on the carirer, tends to hold the head of the dog engaged with the pinion teeth. On the fixed plate, 3, there pivotally mounted a dog, 16, whose head, 16, right-angular-shaped like the dog, 13, engages the teeth of the master gear on the carrier in the same way that the head, 13, of the dog, 13, engages the pinion, a spring, 16, attached to said lever and to the plate, operating to hold the dog, 16, yieldingly disengaged. The dog, 16, carries an abut ment, 17, which is rendered movable on or with respect to the dog by being carried on a lever, 18, pivoted to the dog. t springactuated catch, 19, having spring, 119 engages the lever, 18, to lock it at a certain po sition of the dog for holding the abutment at a desired position for encounter with ce"- taiu determining cams, which are operated by manual keys hereinafter more particularly described. It will be observed at the locking of the pinion, '7, against rotation about its axis, as it is ournaled on the carrier and meshed with the master gear, has the effect of locking the master gear to the carrier; and the two locking dogs, 33 and 16, may therefore be referred to respectively as means for locking the master to the carrier, and means for locking the master to the sup-porting frame structure or to am part which is rigid with that frame structure. For the purposes of the operations to be performed, it is essential that the master gear should be unlocked from the support when it is to be locked to the carrier so as to be carried with the rocking of the carrier ahout the shaft, as the pinion is carried, and therefore without rotating the pinion about its own axis. To cause this cooperation of the two locking dogs so that one shall lock the master to the support when the other unlocks it frr a the carrier and vice vez a, there is provided a lever. 2:), fulcrumed at at 22, on thefixed plate, having one arm providezfl with a slot, 20 engaging a stud. 16 on the lever, 16, the other arm of said lever, 20, extending in a curve about the axis of the carrier; and the dog, 13, is pro' vided with an arm, 13 which has a stud. 13, which stands just within the are of said inner edge, 26", so that when the dog, 16, is rocked about its fulcrum for engaging its head, 16, with the teeth of the master-gear, the lever, 20, by said curved arm, 20 en countering the pin, 13, on the lever arm of the dog, 13, rocks the dog about its fulcrum to disengage the head of the dog from the pinion, 7; and when, by means hereinafter described, the dog, 13, is forced into and held in engagement with the pinion, 7, the pin, 13, engaging the curved arm of the lever, 20, actuates or holds it in position for disengaging the head of the dog, 16, from the master gear for holding it positively disengaged. The carrier, 41, has a rigid stud, 21, and the carrier at the right hand. end of the machine has this stud attached to a plate, hereinafter described which is in turn made fast to the shaft, 21, by which it may be rocked; and these several studs, 21, of the several mechanisms are arranged so as to be connected to each other successively so that they constitute a continuous rod extending parallel with the central shaft, 1, and constihiting a connector for all the mechanisms so that they may be all rocked together. The detail construction for this purpose con ists in making each of these studs, 21, from rods turned down or reduced in diameter at one end and having the re duced portions threaded, forming a screw terminal, 21, the other end being reduced to a shoulder, 21', whose height is the 'cltness of e carrier, 4:, and axially bored L L. l threaded to receive the screw terminal, of the ne adjacent stud piece, so that 1 stud serves as a nut for the next one to the right for securing it to the plate, 4, which intervenes between them on the shoulder, 21 the last stud at the left being secured by a small nut, 21, in lieu of a succeeding handle piece. lt may he understood that when the carrier is rocked about the axis of the shaft, 1, while the master gear is held locuet to the frame and the pinion, 7, is not positively locked against rotation, and thereby not positively locked to the master so that the master gear is not positively locked to the carrier, the pinion would be rotated and the number n correspondingly rotated a distance corresponding to the are throughout which the master gear is held locked to the support. For varying the extent of this are, that is, the portion of the swing of the carrier which is operative for rotating the numeral wheel. according to the number to be added, there are provided nine key-operated cams, D, D D D D D, D D and D 4 ectively, formed as protrusions upon levers, E E 13 ,13, E, E E and E". which are fulcrumed upon a common pivot stud, 25, on the carrier, the cam projections,

lll)

' b the arm 18. on the lockin do 16.

D -D being arcs of varying extent in a circle about the axis of the carrier. Preferably, as a most convenient construction for obtaining compactness, the levers, E -E are of bell-crank iiorni, having their fulcruins near the outer periphery of the carrier, the cain-carrying arrn being extended approximately in an are about the axis, and the other arm, 6, extending a; roximately radially inward, but departing 1 cm radial direction sufiiciently so that it on is alongside of the hub, 11, at a little distance there from, as seen in Fig. 5. Each of the levers, E -E is provided with a spring, 6, connected with the arm, 6, and pulling toward a stud, a to which the other end of the spring is attached, operating hold the cam-carrying arin outwarr. so as to hold the cams out of the pathin which they would encounter the abutment, 17, which is carried The inner ends of all the arms, 5, of the bellcrank levers are beveled as seen 0 giving to the inner end of said levers an acute angle at the side or corner toward the hub, 11, said lever arms, e, being all identically shaped, so that said beveled ends stand iiush with each other when the levers are in their normal position,-that is, the position to which they are pulled by their springs with their came out oi? abutment encountering position. lllounted upon the carrier in the flange or the plate, 10. are nine Keys, K 3?, K", K K K K and K marked respectively with digits, 1, 2, 3, 4;, 5, 6, 7, 8 and These keys are preferably arranged in two rows, staggered. with respect to each other, one row for even numbers and the other row for the odd numbers, and their inner ends overhang lugs, 6 which are formed on hie respective cam-carrying arms of the bell-cranlr levers, which are thereby actuated the resistance of their springs, (2 when the keys respectively are depressed by the operator. For holding the levers with their cains in abut1nent-encountering position when they have been respectiv-ci *ll'lQVECl in by the inthrust oi the is provided a locking dog, 30, SO, and providee with a spring, so, pressing it towa the ends of the levers, E -5W, said dog being adapted to overhng and engage the acute-angled corner, c oi all said le t is, said lip or nose extending across the or e group of lovers. V'lhis lip is itself an acute angle having its outer face, 30*, parallel with the flush end, 6 of the levers, and bearing against them, as seen in Fig. l. Whenever any lever is operated by the key so as to swing downward the arm, a, 'it will be seen that the beveled end, 6 of that particular lever will crowd the lip of the dog, 30, back away from the flush ends of the remaining levers, and that upon acute angled corner of the lever arm which is being actuated, passing by the acute angle of the lip of the dog, the dog will react and enthe said acute angle, holding the lever the depressed position, the dog being again stopped against the flush ends of the remaining levers. From this COB-i ruction will result also one lever having been depressed by its key and engaged, as'described, by the dog, vhen another lever is similarly depressed, the dog will be forced b el: by the last depressed leveras it was by the first, and thereby the first depressed lever will be released while the last depressed lever will be engaged. Thus the actuation oi any key by the operator will release the lever previously actuated by an otl'ier key, and the first actuated. key will be returned to its normal position.

11 Fig, 2 the parts are shown in what may be termed the rest position, or initial position at which it may be assumed that the numeral wheel stands with Zero l) exposed the reading aperture,that is to say, at what may be called zero position. 1 9 this position the pinion-locking dog, 13, is held positively engaged with the pinion for locle ing it, and thereby locking the master gear to the carrier, by means of a projection, 5, on the fixed plate, 5, upon the or ape oi which the stud pin, 13, is lodged, stopping the dog against rocking in direction to disengage or release the pinion. it will be understood that the dog is held normally in this position by a spring, i l, but this engagement would not be positive except for the projection, 5 stopping the stud or pin, 13 ll hen the operator now depresses any key, as the key, 9, for example, forcing the corresponding cani inward to position for encountering the abutment, 1", on the lever arm, 18, carried by the dog, 16, and alter depressing the key rocks the carrier in the direction of the arrow on Fig. 1, in the first step of said rocking movement that is, through an angle, corresponding to the tooth-to-toeth distance on there aster gear,- t abutment, 13 on the locking dog, 13, is carried off from the projection, 5, on the plate, 5, while the cane, D", is encountering the abutment, 17, and depressing the head oitthe do 16, into a notch oi: the master gear; and in the same amount of movement of the carrier which thus operates the dog, the movement of the 1G, by the engagement or its stud, 16 in the slot, 20, of the lever, 20, causes the lever, 20, to be rocked about its fulcrum, swinging the arm, 20*, inward against the abutment, 13, on the dog, 13, and thereby actuating said dog, disengaging its head from the pinion, 7 and as the carrier continues to rock, the dog, 16, is held by the cam, D in engagement with the master, holding the master lined, and thereby causing the pinion to rotated by its engagement with the master; while the carrier rocks the pinion over the master through an angle corresponding to the extent 01" said cam, D Vhen the abutment, 17, has passed the cam, the abutment,-

dog, 13, :tor engaging the pinion, operates the lever, 20, which by its connection at 16, with the dog, 16, positively turns the head, 16, out of engagement with the master gear, independently of the action of the spring, 16, tending to the same result. The master gear is thereby held locked to the carrier and unlocked from the support throughout the angular extent of said projection, 5, of the plate, 5. This angular extent is made to correspond with the column capacity of the in strument, that is, to the number of the adding mechanisms which it comprises, and in the travel of the abutment over this are, the carrying from each column to the next is effected, as hereinafter more particularly de scribed. The cams, D -D have their terminal edges even, the variation in length being at the initial end of the cam projection, thus causing the later arrival and encounter of said initial ends with the abutment, 17, of the cams corresponding to the lower numbers, the cam for No. 9 arriving for encounter with the abutment as described, and forcing the dog, 16, into locking engagement with the master gear and causing the lever, 20, to disengage the dog, 13, from the pinion, 7, in the first step of the carriers movement away from its initial or rest position, the cam, D arriving and similarly operating in the second step, the cam, D arriving and similarly operating in the third step, etc; so that whatever be the number to be added and the key accordingly struck and the cam thereby brought into operative position, the resulting adding movement will be completed at the end of the tenth step of the carriers movement from rest position, that is, by the time the abutment, 13, has reached the shoulder, 5, and while the terminal end of the cam is passing ofi' the abutment, 17, releasing the dog, 16, the abutment. 13, is climbing the shoulder, 5, forcing the positive engagement of the head of the dog, 13, with the pinion, this change of locking from one dog to the other occupying one step of the carriers movement.

The carrying of. one (1) from each column to the next succeeding column upon the completion of the tenth step of rotation of the pinion and numeral wheel of the mechanism corresponding to the column from which the carrying is to be done, is efiected by means of the lever, 26, tulcrumed at 26 on the carrier plate, 4, and having a cam ratchet tooth, 26*, positioned for encounter with the cam ratchet tooth, 8, of the disk, 8, which is carried by the numeral wheel or as a part thereof, such tooth, 8*, occurring, as already statet at each tenth numeral space of the numeral wheel. A spring, 27, connected to the arm, 26*, of the lever, 26, operates to hold the lever in position for encounter of its tooth, 26, with the tooth, 8 when the latter comes around; and said lever, 26, has an arm, 26 provided with a locking tooth, 26 for engagement of which there is provided a latch, 28, fulcrumed at 28, on the carrier plate, 4, and provided with a spring, 29, tending to engage the hook nose, 28, oi: the latch with the hook nose, 26 of the lever, 26, when the last mentioned lever is moved about its "fulcrum by the encounter of the tooth, S, with the tooth, 26, so as to swing the point of the tooth, 26, down past the point of the tooth, 28, that is, away from the position shown in full line in Fig. 1, to the position shown in dotted line in that figure, the latch, 28, being upon said change of position of the lever, 26, actuated by the spring from the position shown in Fig. 4 to that shown in Fig. 5. lVhile the lever, 26, is retracted slightly to the position shown in Fig. 5, the tooth, 26, protruding again in the path of the tooth, 8, sufliciently for locking engagement of said teeth upon reversal of the wheel, 8. The lever, 26, has an arm, 26 which is deflected out of the plane of the remainder oi the lever so as to stand upon the opposite side of the plate, 4, from that at which the lever is mounted, and at the end of this arm, 26 it is provided with a cam projection, 26 The dog, 16, is provided with a pin or stud, 16", constituting an abutmentprojecting to the right and into the path of the cam projection. 26, of the next preceding mechanism. For the purpose of positioning the abutment, 16 properly on the dog, 16, in the several mechanisms, said dog in each mechanism is provided with nine holes, 16 in the arc of a circle about the axis of the carrier, and spaced one step from each other; and the abutment pin, 16, for the second mechanism is mounted in the first of these holes, that is, the one nearest the end of the dog; i the third mechanism the pin is mounted in the second hole, and so on, the last mechanism having the pin mounted in the eighth hole; so that the encounters of the cam abutments, 26, with the abutment pins, 16*, will occur successively one step apart in the rocking movement of the carriers; and the arm, 26, oi? the lever, 26. is dimensioned so that the encounter of the same abutment, 26, of the first mechanism with the abutment pin, 16", of the second,

will occur in the first step of the movement of the carrier after the abutment, 13, has climbed the shoulder, 5", at the conclusion of the adding nmrement which terminates as described with the locking oi the pinion o the d 13, and the releasing oi the master gear from the dog, .16, in the first step of movement he m-ii his 'nt, therefore, it will be seen, the cam projection, 26 of the first mechanism will he hoiding the dog, 16, of the second n'ieohanism engaged with the master gear or said second mechanism, so that the pinion of said second mechanism will be rotated by engagement with the master gear and will cause the numeral wheel of said second mechanism to be rotated one step, thus adding one (1) to the indication, carried trom the preceding mechanism. The ang lar extent of the cam projection, 26, corresponds only to one step and therefore only one (1) will be carried in such operation, and this will occur only i'f during the preceding adding movement of thenuineral wheel oi the arst mechanism, that numeral wheel has been rotated past the zero point, so that the tooth, 8, of that numeral wheel has encountered the tooth, 26, oi the lever, 26, and has moved that lever to the position shown in Fig 5 where it is locked by the latch. as, as mscribed, thereby carrying the cam projection, 26 radially inward to the oath of he subsequent rocking movement of \llQ carrier to bring it into encounter with the abuti ,lt pin, 16". Similarly, in each succeeding step of the carriers movement in the same direction, a carrying will be eitected from any mechanism whose numeral wheel during th adding movement plus the carrywg movem nt derived from the preceding mechanism, has been broug t to or past the Zero point; and the reason for positioning the abutment pins, 16 in the successive mechanisms, each one step beyond the position in the preceding mechanism, is to give to each mechanism the benefit of any carrying which may come to it from the preceding mechanism before its own carrying action upon the next fol lowing mechanism.

For releasing the lever, 26, from the latch, 28, at the limit of the rrying movement it ie tail, 28", of the latch, 28, collides in the last increment of: that movement with a pin, 28, which is carried by lever, 20, whose variation of position is not enough to make it for this puroose any diil erent iroin a fixed part.

When the carrier has been rocked through the-necessary number of steps for the dding action and for the subsequent carrying action, it is to be rocked back again to initial position; and clearly it is necessary that in this reverse movement the master must be released from the support, so to be rocked larly in the reverse movement,) it becomes necessary to shift the abutment, 17, on the locking dog; and it is with a view to this necessity that the said abutment is made movable on the locking dog by being mounted upon the carrying lever, l8, and latched in operative position by the catch, 19, as described. For the purpose of thus shifting the abutment, 17, before the reverse rocking movement of the carrier begun, there is mounted on the carrier an arm, 70, projecting forwardly in the direction oi the adding movement of the carrier, having a beveled end, 71, which operates as a cam encounteringa pin, 19, which projects from the catch, 19, to rock the catch and to dis engage it from the catch hook, 18 of the lever, 18, said arm, 70, being dimensioned and. positioned so as to encounter the pin, 19", at any time in the carriers movement atter the completion of the adding movement,that is, after the abutment, 13, has passed the shoulder, 5. The edge, 70 of the arm, 70, is concentric with the carrier so that after the beveled cam end, 71, has encountered the pin, 19, for disengaging the catch, the pin riding along said concentric edge of the arm, 70, holds the catch disengaged for the remainder of that movement of said carrier; and the carrier has another arm, 72, extending similarly to the arm, 70, in a proper plane to cause its encounter with the abutment, 17 in the last step of carcountering end of said arm, is beveled as shown at 72*, so that by its encounter with the abutment, 1'7, it cams the latter inward out oi the path of the key-operated cam of whatever number it may be which waslast depressed in the adding action; and there by the return movement of the carrier is effected with the master wheel U'IllOCkQt from the support and moving with the car.- rier without rotating the pinion of numeral wheel.

is the carrier is melting the laststep in the return movement to rest or initial position, an abutment, 35, on the carrier encounters a slight camming projection, 18, on an arm, 18, with which the abutmentcarrying lever, 18, is provided, and by that encounter, the said lever, 18, is moved for carrying the abutment, 17, back to the posi tion which it should occupy on the dog, 16, in order to cooperate properly with the key operated cams; and the lever, 16, is locked in thatposition by the catch, 19, and the parts are thereby located properly for the next adding movement of the carrier.

It will be observed that in order to permit the one step movement of any number wheel to which a carrying from the preced lag mechanism is to be made, the pinion 01"- that number wheel must be released from the locking dog, 13, for the one step; and for that purpose the projection or concentric upraise, 5 of the fixed plate, 5, in each mechanism has anotch, 5 positioned at the number of steps distant "from the shoulder, 5, corresponding to the number of the column to which the mechanism corresponds, that is, said notch in the second mechanism being at the first step beyond the shoulder, 5, the third mechanism being at the second step, and so forth. It will be seen that the abutment, l3", dropping into this notch, 5 releases the dog, 13, from the pinion for the one step only, becoming), engaged immediately thereafter as the pin, 13, rises out of the notch, 5.

it will be understood that in adding a number comprising digits in several col umns, the operator will in the mechanisms corresponding: to the several columns, depress the lreys corresponding to the digits belonging to that column, performing this process in all of the mechanisms,that is. for all the columns, before any movement of the carrier is made; and when the proper keys have been depressed in all of the mechanisms for the several columns in which there are digits to be added, he will swing the carriers all together from rest position to the limit of the advance of adding movement and then return to rest position. Meanwhile, in the absence of means to the contrary, all the keys which have been depressed remain depressed, and the corresponding cams are protruded and repetition of the operation,that is, swinging the carrier first in advance and then reverse direction, back to rest position, would again add the same number. It will be obvious that this affords a process 0t multipiying any number by any other number, the method consisting in pressing the keys corresponding to digits of the number to be multiplied then advancing and re\ *ersing the carrier as many times as the number of the multiplier. The product will then be indicated at the sight apertures of the several mechanisms.

Except for multiplying or repeatedly adding the same number, the set up of the numeral wheels should be erased,that is. the keys and the key-operated cams should all be returned to normal position upon completing the operation of the carrier for adding the number set up. This is effected automa ically by the following .1. lever-latches, 30., are extend d down from their fulcrums. 30. their extensions. 3 terminating with their ends flush and beveled shown at 3%; and a set-up-clearing bar, -65, is carried upon lever arms, 66, mounted upon the frame, said bar extending across behind all the mechanisms, and in position to be encountered by the beveled ends, 32 of the levers, 30, at the limit of the advance or adding and carrying movement or the carrier, to cam the lever latches, 80, out of en gagement with the ends, 6 of the am-carrying levers to permit them all to be returned by their springs to inoperative position of the cams, thereby restoring their respective keys to normal position.

For the purpose of erasing the set-up at any time, as to correct an error, a red, -13, is provided carried on lever arms, of a rock shaft. 44, positioned for swingi g up against the beveled ends, 32, of the lever latches, 30, with the same effect of cammiug the latches out of engagement with the ends, 6 of the cam-carryin levers, as already described.

The set-up-clearing bar, (35, will be and locked out 0t position for encounter with the lever ends, 3;, by means of a stud, (37, on a lever, 67, fulcrumed on the shaft, 1, said stud engaging the operating lever arm, 66 of the clearing bar, when the lever, 67, is operated by depressi" g is forward end causing the stud to along the inclined cam slope, 66", of th. ever arm, lockmg ably in the notches, 66 and 66 at the lower and upper limits respectively of said cam slope. A spring, 68, connects the operating lever, c2, with the arm, '36, for yieldingly holding the clearing bar, 65, forward to the limit permitted by the abutment, 6T, lodged either in the notch, 66, notch, 66, or on. the intermediate cam slope, 66.

T his setupclearing device, 65, is utilized for the additional. purpose of preventing the reversal of the carrier from rest position for clearing the en .1, when the process of multiplication or repeated addition ot a given number to be performed. For this purpose the arms, (36, are extended up so that when the set-up--cleari;.1g device is adjusted out of range or the latches, 32, the ends of said arms are in the path or the tie rod, 21, and immediately below said tie rods at the rest position of the carrier, thus preventing any rocking movement of the carrier back from said initial or rest position.

For "sum-clearing,--that is, for restoring all the numeral wheels to zero position after the completion of any add process, the carriage is rocked in reverse di ection from its normal or rest position. In the first step of this reverse movement, the abutment pin. 13 of the dog, 13, runs oil the up 'aise or projection, 5, on the plate, 5, and role ses the pinion, 7, from the positive delei'itiou sition for encounter of said beveled end with said abutment by a relatively strong spring, 47, connected to the arm, as of said lever, 46, and to a stud, 48, on the carrier plate, and operating to hold said lever, 46, with its said arm, e6 stopped against the stud, 35. For the purpose of the operation to be effected by the encounter of the stud, 1?, with the beveled end, 46 of this lever, the lever may be considered as positively fixed on the carrier, and said encounter therefore causes the dog, 16, to be engaged with the master gear, locking it to the support. The inner edge of the lever arm, ac, is concentric about the axis of the carrier and operates therefore to hold the abutment in position for holding the dog in looking engagement with the master during the succeeding portion of the reverse rocking movement of the carrier away from its rest position, so that in such movement the pinion meshed with the master is rotated in reverse direction, but no farther than until the abrupt shoulder of the cam ratchet tooth, 8, encounters the abrupt shoulder of the ratchet tooth, 26, on the lever, 26. Upon such encounter any further rotation of the pinion being positively prevented, further rocking of the carriers reverse movement causes the head of the dog, 16., which is engaged between the teeth of the master, to be crowded out of such engagement, this being possible, because the lever, 46, is in fact only yieldingly held in the position for holding the dog en aged with the master gear, and can yield to permit the head of the dog to be forced out frombetween the teeth as indicated. Such action might continue from tooth to tooth while the carrier is rocked back to the full limit of nine steps which would be necessary to restore to zero point. all the numeral wheels. But to prevent the annoyance of the clicking of the dog over the successive teeth, involving also undesirable wear upon the teeth of the dog,-

well as requiring undesirable force to be applied to the rocking of the carrier, there is provided a lever, 50, fulcrumed on the tie rod, 3, of the frame, having the end, 51, of one arm extending in position outside of the abutment, 19", upon the catch, 19, for engagement therewith to stop it, so that when the head of the dog, 16, is crowded out from between the teeth of the master gear as described, carrying outward the pivot of the catch on the dog, the stud, 19", on the catch stopped against the lever. 50, becomes a fulcrum for the catch which is thereby rocked on that fulcrum and turned on its pivot on the dog and disengaged from the lever arm, 18, and thereby releasing; the abutment, l7,

for movement with respect to the dog, so that the dog is free from the control of the lever, 46, and when once it is crowded out from between the teeth of the master de scribed, may remain disengaged therefrom. For placing and holding the lever, 50, in the position for operating as. described, the end oi. the other arm of the lever, 50, is provided with a projecting stud, 50, and the carrier plate, a, past which said stud projects has a cam shoulder, 49, followed by a projecting concentrically edged portion, a said shoulder being positioned for encounter with the stud, 50-, in the first step movement of the carrier in reverse direction from the position of rest,that is, in the first step of the clearing movement,the lever, 50, being operated by said encounter to swing the opposite end, 51, inward to the position above described where it checks the abutment of the catch, 19, and holds it in said checked position throughout the remainder of the clearing movement while the abutment, 50, traverses the concentrically-edged projecting portion, 4, of the plate, 4.

Upon the completion of the clearing movement by which all the numeral wheels are reversed to zero position, if there is any numeral wheel which stood at nine, the reelse of the master from the engagement with the dog will be effected in the last step of said reverse or clearing movement by the encounter of the abutment, 50, on the lever, 50, with the cam shoulder, l, on the plate, a, situated at the limit oi said concentrically edged projection, P, and by that encounter the lever, 50, will be rocked about its pivot to swing inward the end, 51, agai st the abutment, 19 on the catch, thereby cisengaging the catch from the lever arm, 18, and releasing the master from the d The master gears of all the me hanisms being now released, the carriers are all rocked back to initial or rest po tion without causing any rotation of th niens or number wheels, which are thereev brought back to said initial position of the carrier with the number wheels all standin at zero ready for new operation.

lit is important that ,wb movement oi the 1 r in either i has been begun, it .hc-uld be completed in that direction to the limit: and this equally true with respect to the adding and carrying movement and with respect to the reverse movement to initial rest position, and also with i spect to the further reverse movement 't'or clearing. In order to insure that when a movement has been begun it snail be completed to the limit, there is secured to one of the carriers,-and it is imnaterial which one, since they all rock together,-a segment, 55, notched 'l'or engagement of the detent' pawl, 56 the latter being pivotc-i'l on the frame and extending for its locking engagement obliquely to its lodgmenton the periphery of the segment. The notches approximately right-angular and bisected by radii and are adapted therefore for ratchet-wise engagement with the pawl trending obliquely in either direction for such engagement. 'llhe pawl is provided with means tending to hold it normally radial to the earr er and to return it to such po ition from either oblique position. The segment, has one notch positioned for entrance of the pawl thereinto at the rest position of the carrier rid notch being deep enough to permit the pawl to swing freely in its normal radial position; and at each end of the segment it is cut away so that the pawl can take its normal radial position. \Vith this construction it will be seen that noon the carrier being moved from rest pos 'an in either direction the pawl will trail along the notched ed yof the segment, engaging the n 'ches successively against reverse mo vemcnt of the carrier, until said movement in the direction in which the same has been begun has carried the segment beyond the pawl or to the deep notch, and thereupon the carrier being reversed will reverse the position of the pawl, so that it will trail back over the notched segment in the opposite direction. Such reversal it will be seen, will happen at the rest position an d at the two extremities of the segment, and the carrier will therefore be ro ked from rest position in eithe direction to the limit and from either back to the rest position, but cannot n. .i. versed at any point in the movement between said rest position and said limits spectivelyi The particular form of device provided for controlling the pawl consists of two dogs, 57, trending-in the same direction from their pivots but c nnected by a spring tending to draw their free ends toward each other, and to draw both dogs to ward an intermediate stop pin, 58. The pawl, 56, has an arm, 56, which extends between the free ends of the dogs, 57, 57, so that said pawl is normally held in radial position and comes to that position whenever there is opportunity, and is held by the spring which connects said dogs, 57, 57, pressed in inclined position in one direction or the other against the segment.

For stopping the rocking movement at the rest position upon return from the adding movement, there is provided a stop device, 59, mounted on the right-hand end standard in position to be encountered by the lug, 61, on the latch, 61, which is pivoted on the operating handle lever, 60, which is secured to the right-hand end of the shaft, 1, said latch being held by the spring, 62, in position for said encounter. but adapted to be swung out of encountering position to permit the rocking of the carrier in the reverse chine a helical spring, 80, provided for returning the mechanisms, A, to normal position after each adding operation, said spring having its outer end secured to the left-hand standard, 2, at 2, and its inner end secured to the stop collar, 1, fast on the left hand end of the shaft, 1.

To facilitate assembling the several mechanisms, A, and menu ing and positioning the levers, 50, on the tie rod, 3, said rod is a multiple-part rod, as above stated, the several sections having each at one end a reduced shoulder, 3 and an axial threaded bore, 3", and at the other end a reduced shoulder, 3 and a reduced and threaded terminal, 3, which screws into the bore, 3*, of the adjacent section. The space provided by the shoulders, 3, accommodate the plates, which are thus spaced by the section lengths and the shoulders, 3, accommodate and position the lovers, 50, which are pivoted on said shoulders and definitely stopped be tween the facing shoulders, 33, of one section, and the end from which the threaded terminal. protrudes of the adjacent section.

The assembled mechanisms. A, may be inclosed in a two-part case, B, B, the part, B, being applied as a cover to the part, B, and both parts being engaged with the end standards, 2, 2. The securement of the left-hand ends of the case is made by nuts, 1, set through holes, (5, at the lefthand end of the case members, and screwed onto threaded studs projecting from the left-hand standard, 2. The stem of the stud, 1, which car rics the spring, 80, is utilized for this purpose with respect to the cover member, B, and a stud, 2 is provided for the lower member, B. At the right hand end the studs on the standards are bored and tapped, instead of being exteriorly threaded, and the securement is by means of headed screws, 2", whose heads engage outside of the end wall of the case. The stop, 59, for the operating handle levers, 60, may be utilized at the right hand end for securing the case, a bushing, 59, under the head, 59, of the screw, 59, serving as the part for encounter of the lug, 61. of the latch, 61, as described.

F or facilitating assembling, the lower member, B, of the case has the upper edge of the ends notched as seen at B, for lodgment of the protruding bearings, 1", 1", of the shaft, 1, and the said lower case member thus becomes a cradle for the mechanism while manipulating the various parts in completing the assemblage and adjustment. The cow-ermember, B has the lower edges of its ends suitably notched as seen at 6 lo stride the bearings, 1*.

I claim 1. In a mechanism for the purpose indicated, means for rotatin a numeral wheel which consists of a .mthed master and means for looking it fixed; a pinion which op rates the numeral wheel meshed with the master; a carrier for the pinion mounted for movement to carry the pinion back and forth along a path conformed to the master, and means on the carrier "for actuating the master-locking means adapted to so actuate said means by the movement of the carrier in one direction. v

2. In the construction defined in claim 1 foregoing, the master-lock-actuating means being formed for said actuation at a prede termined point in the carriers movement.

3. In the construction defined in claim. 1 foregoing, the master-lock-actuating means being formed for said actuation at a predetermined point in the carriers movement, and for maintaining said looking through a predetermined further movement in the same direction.

4; In the construction characterized in claim 1 foregoing, the master-locking means beingnormally disengaged from the master and the master being free to move with the carrier from a selected position; means for actuating the locking means by a predetermined movement of the carrier from said position; and means for releasing said locking means after a predetermined -furth er movement of the carrier in the same direction.

In the structure characterized as delined in claim 1 foregoing, a fixed support for the master and carrier, the master looking means being-arranged for looking it to said support; means on the carrier for operating the locking means at a predetermlnl130ll1ll in the carriers movement in one direction, and for holding it locked for a predetermined further movement in the same direction.

6. In the construction defined in claim 1 foregoing, a fixed support for the master and the pinion carrier the means for locking the master fixed being arranged -for loclnng 1t to the support; means for operating said locking means at a predetermined point in the carriers pinioncarrying movement in one direction, and holding it locked to a predetermined. limit of further movement in the same direction; means for releasing it at the last mentioned predetermined limit, and means for locking the master to the carrier simultaneously with its release from the support.

7. In a construction characterized as defined in claim 1 foregoing, a fixed support for the master and for the pinion carrier; the means for locking the master fixed be ing arranged for locking it to the support; means for operating said locking means at a predetermined point in the carriers pinioncarrying movement in one direction, and holding it locked to a predetermined limit of? further movement in the same direction; and releasing it at said limit, and means for locking the pinion against rotation about its own axis simultaneously with said unlocking of the master from the support.

8. In a structure characterized as defined in claim 1 foregoing, a fixed support tor the master and for the pinion carrier; the means for locking themaster fixed being arranged for looking it to the support, said locking means being normally unengaged at a selected initial position of the carrier; a releasable stop for arresting at that position the carriers movement in one direction, and means for engaging said locking means for holding the master fixed upon movement 01 the carriage beyond said stop in said direc tion.

9. In the structure characterized as defined in claim 1, a fixed support for the master and the pinion carrier; the means for locking the master fixed being arranged for locking it to the support, said locking means being normally unengaged at a selected initial position of the carrier; a releasable stop tor arresting at that position the carriers movement in one direction; means for engaging said locking means for holding the master fixed upon movement of the carrier beyond said stop in said direction, and means for releasing the master upon reverse movement from the limit of the .carriers, movement in said direction.

10. In a structure characterized as de fined in claim 1 foregoing, a fixed support for the master and-for the pinion carrier; the means for locking the master fixed being arranged for locking it to the support, said locking means being normally unengaged at a selected initial position of the carrier; a releasable stop for arresting at that position the carrier s movement in one direction; means for engaging said locking means for holding the master fixed upon movement of the carrier beyond said stop in said" direction; said locking means being yieldably engaged with the master, whereby the master can be positively moved notwithstanding said locking; the pinion having means for. positively arresting its reverse rotation at the zero position oi the numeral wheel, thereby at that position positively locking the master wheel to the carrier wheel.

11. In the structure defined in claim 1, the master member being a gear wheel, and the carrier being mounted for rotative movement about the axis of said master gear wheel.

12. In the structure defined in claim 1 the master member being a gear w eel a fixed support for said master and i the carrier, the master gear and the carrier being mounted for rotative movement about the axis of the master gear wheel.

13. In the structure defined in claim 1, the master member being a gear wheel a fixed support for said master and for the carrier, the master gear and the carrier being mounted for rotative movement about the axis of the master gear wheel, and disengageable means for engaging the carrier and master gear wheel for said rotativc movement together.

1 1. In an adding machine in combination with a fixed support,.a gear toothed master member; a carrier for a numeral wheel mounted for movement to carry said wheel along a path conformed to the outline of the master member; a pinion for rotating a numeral wheel carried by the carrier in its movement along said path means for locking the carrier and master member for movement together along said path; means for unlocking them from each other to permit relative movement and thereby cause rotation of the pinion about its axis to result from the continued movement of the carrier, and means for subsequently in the same movement of the carrier bringing the locking means into operation at a predetermined point in the path of their relative movement; whereby the extent of rotation of the numeral wheel which results from said relative movement is predetermined.

1 In the construction defined in claim l t foregoing, the said means for engaging the carrier and master member, consisting of means for locking the pinion against rotation about its own axis.

16. In the construction defined in claim 14, means for predetermining the disengagement of the carrier and master member. consisting oi? manual key and a cam actuated thereby tor intrusion in the path ct rotative movement of the carrier and master member. and an element on the carrier positioned for encountering the cam in said path.

17. In the construction defined in claim l-h the means for predetermining the limit of engagement of the carrier and master member, comprising a locking device for holding the master member immovable; a manual key; a cam actuated by the manual and a part operatively connected with the locking device positioned for encounter at the cam tor locking the master member to the support and connections from the c mmerated part tor simultaneously refeasing the master member from the carrier.

18. In an adding machine a master gear wheel; a carrier for a numeral wheel mount ed for rocking about the axis of the master gear; a pinion for rotating a numeral wheel carried by the carrier in its rocking; means for engaging the carrier and master wheel together for rocking in one direction, and means tor releasing said engagement and locking the master gear against rotation and means on the carrier for actuating said locking means at a predetermined point in the rocking movement of the carrier.

19. In the construction defined in claim 18 foregoing the means for said releas ng and locking and determining the time thereof being a manual key and a cam actuate 1 thereby for movement into the path of the locking and releasing means.

20. In the construction defined in claim 18 the means tor engaging the master wheel and carrier consisting of means for locking the pinion against rotation about its own axis.

21. In a construction for the purpose indicated, in combination with a numeral wheel carrier, a master wheel by which the numeral wheel is rotated; a master-locking dog for holding the master wheel non-rotatable; a cam-encountering abutment carried by the dog; a cam for encounter ot the abutment to force the dog into master-locking position; a lever pivoted on the dog for carrying said abutment movably with respect to the dog ;.a catch on the dog having means tor engaging the abutment-carrying lever to lock it positively on the dog at camencountering position of the abutment and means for releasing the catch in the latter part of the stroke of the carrier in the direction tor the cams encounter with the abutment, and after the abutment has passed the cam.

22. In combination with the structure defined in claim 21 foregoing means on the carrier which positively actuates the abutment carrying lever after the release of the catch to move and hold the abutment out of range of the cam.

23. In a construction for the purpose indicated in eombinati on with a number wheel and means for rotating it comprising a gear wheel and a master *ith which the gear wheel engages for rotation of the gear wheel upon relative movement of the master and the gear wheel. and means for controlling the period of such relative movement comprising a master-locking dog, a cam for operating the dog, a cam-encountering abutment and a movable part by which it is carried on the dog: a catch on the dog which engages the abutment-carrying part to positively lock the abutment at cam-encountering position. said catch being exposed tor encounter for releasing said part, and means on the carrier adapted to subsequently move said partllout of cam-encountering position of the abutment; Q

2In an adding machine, in combinaaxis of the master gear; a pinion for rotatinga numeral wheel carried by the carrier in its rocking movement; a dog for locking the pinion against rotation about its axis,

whereby the master gear is locked to the carrier, a fixed support for said parts; a dog for locking the master gear to the fixed.

support, and means for operatively connecting the master-locking dog and the pinionlocking dog for simultaneous release of one and engagement of the other.

25 In afstructure for the purpose indicated, in combination witha fixed support, a gear-toothed master member; a carrier for numeral wheels mountedfor back-andt'orth movement along a path conformed to the master member; a pinion meshing with the master member for rotating the numeral wheels carried by the carrier in its back-andt'orth movement; a master locking dog; a

pinion-lockin do means for movln the L b t) D master locking dog for engaging the master, and operatlng connections between the two dogs for ,simultaneously disengaging the pinion locking dog and engaging the master locking dog, and means for reversing said engagements; said first mentioned means comprising a manually-operable cam and an abutment for encounter therewith, on one of said dogs;

26. In the. construction defined in claim 25, foregoing, the second mentioned means comprising coperating abutments one in the connection between. said dogs and the other on the fixed support, which come into mutual encounter at the limit of the cams engagement with the cam-encountered abutment.

#27. In a structure for the purpose indicated, a plurality of numeral-wheel-operating mechanisms, each comprising a numeral wheel, a master gear, a pinion thereon meshing' with .the master gear, support on which the carrier and master gear are coaxially mounted; a dog for locking the mas ter gear to the support, means for locking the master gear to the carrier and releasing it from the support, cams for controlling the master locking dog; said mechanisms being mounted co-axially in the support, each numeral Wheel having an eccentricity for each ten numeral indications; a cam carrier operated by said eccentricity, and a carrying cam on the cam carrier positioned. for operating the-master locking dog of the next succeeding 0t saidmechanisms.

28.Inthe structure defined in claim 27 foregoing, each of said mechanisms comprising a complement of numeral keys, cams actuated by said keys respectively and dimensioned for engaging the master locking dog through varying range of movement of the cam corresponding to the numeral indications of the respective keys, the carrying cam being positioned with respect to the abutment with which it cooperates, for encounter therewith at a point in the path of the rocking movement of the carrier beyond the range of encounter of all said varying cams with the respective locking dogs.

29. In the construction defined in claim 27, each of said mechanisms comprising a complement of numeral keys; cams actuated by said keys respectively, positioned and dimensioned for engaging the master locking dog through varying ranges of movement of the carrier corresponding to the numeral indications of the respective keys, the carry ing cams 01" the successive mechanisms being all positioned with respect to the locking dog operating abutments with which they respectively cooperate, for encounter there with at points in the path of the rocking movement of the carrier beyond the range of encounter of all said variously dimensioned cams with the locking dog, and being successively positioned for encounter with said respective abutments each at a point one step beyond the encounter of the last preceding carrying cam.

30. In the construction defined in claim 27, foregoing, in combination with each of said mechanisms, a carrying cam, an arm on which it is mounted; a spring holdingit normally out of operative position; means on the numeral wheel for moving it into operative position; a spring-operated latch which engages the cam-carrying arm to retain it in operative position; means. oper ated by the carrier in its return to initial. position after a numeral-wheelfeeding movement for disengaging said latch to permit the carrying cam to return to inoperative position.

31. In a device for the purpose indicated, in combination with a numeral wheel and means for rotating it comprising cooperating parts adapted to he engaged and. disengaged for controlling the extent of rotation of the numeral wheel, cams foretlecting such engagement, plurality of cam-carrying latches pivoted for rocking about COI11 mon fulcrum, each. latch terminating in an edge which at one limit of the range of movement about the common 'i'ulcrum is flush with the like edges of all the other latches and oblique to the path oi said edges in said movement; means for yieldingiy and independently holding the latches respectively at said limit; a, catch adapted to engage the corner of the oblique end of the latches. and means for holding said latch yieldingly against said oblique end; whereby the movement of any one of said latches about its fulcrum causing the corner of the oblique ends to protrude from the plane with all said edges flush, causes said protruded end to be engaged with the catch and releases from the catch any other previously protruded end.

32. In combination with the structure de fined in claim 3i foregoin eans apart from the latches :tor releasing the catch to permit any displaced and engaged latch to return to the position at which said edges are flush.

33. In a structure for the purpose indicated, a plurality of mechanisms. each characterized as defined in claim 31. and means apart from the latches for releasing the catches of all said mechanisms to permit the displaced and engaged latches oi all of them to return to the positions at which said edges of the latches of the respective mechanisms are flush.

3a. In the structure defined in claim il, in combination with a numeral-wheel-operating mechanism which comprises a carrier on which the cam-carrying latches and catch are mounted, and which is moved through a definite path for operating the numeral wheel; a tripping member, located in the path of the watch as it is carried by the carrier, for encounter with the catch at the limit of the numeral-wheel-operating move ment of the carrier.

35. In the structure defined in claim 31, in combination with a numeral-wheel-operating mechanism which comprises a carrier on which the cam-carryin g latches and catch are mounted and which moves through a definite path for operating the numeral wheel; a tripping member, movably located in the path of: the catch as it is carried by the carrier, for encounter with the catch at the limit of the numeral-wheel-operating movement of the carrier, and means for moving said tripping member into and out of said path at will.

36. In the structure defined in claim 31, in combination with a numeral-wheel-operating mechanism which comprises a carrier on which the cam-carrying latches and catch are mounted and which moves through a definite path for operating the numeral wheel. and is adapted to be moved in the opposite direction from its initial or rest position for reversing the numeral wheels to cancel their indication, a tripping member movably located in the path oi the catch as it is carried by the carrier, for encounter with the catch at the limit of the forward or direct numeral-wheel-operating movement of the carrier, and means for moving said tripping member at will into and out of said path; said member having means which when it is moved out of said path obstructs and prevents the movement of the carrier in said reverse direction from its initial position.

37. In a structure for the purpose indicated, a plurality oi mechanisms, each having in combination with the structure defined in claim a numeral-wheel-operating mcvhanism which (comprises the carrier on which the cam c: rryi p; latches and catch are mounted, and which is moved through a definite path for operating the numeral wheel, a tripping har extending past all said mechanisms and adapted to be positioned in the path of the catches thereon as the latter are carried by the carriers, for encounter oi said tripping bar with the catches at the limit of the numeral-'wheel-operating movement of the carriers.

38. In the structure for the purpose indicated. a plurality mechanisms each characterized as defined in claim 1, and having the latches ot' the r cti've mechanisms coaxial or with their iulcrums alined: a rock shaft parallel with said alined fulcrum, said rock shaft having a lever arm and an abutment carried by said lever arm which upon the rocking of said shaft encounters the catches of all said mechanisms and moves them for release of the latches engaged by them respectively. and means for operating said rock shaft.

39. In a device For the purpose indicated, in combination with a numeral wheel and means for rotating t omprising a pinion and a gear intermeshing: a ratchet cam on the pinion: a numeral-wheel feed-controlling lever having a ratchet cam projection for cooperating with the pinion-carried ratchet cam. a latch for engaging said lever to lock it in numeral-wheel-feedcontrolling position. the cooperating ratchet cam. and cam proiections being adapted by their encounter to move the lever to a. position For engagement by the latch, and the latch being adapted to permit retract on by the lever without disengage ment of the latch into pos tion for ratchwise engagement of the ratchet cam against reverse rotation of the pinion.

40. In ombination with the structure de-' fined in claim 39 foregoing, means for disen gaging the cat h to release the numeralwheel feed-controlling lever.

41. In a device -for the purpose indicated, a plurality of mechanisms characterized as defined in laim. 35 foregoing, arranged side by side with their corresponding pivotally mounted or rotatable parts respectively coaxial, a carrier on which all the parts enumerated in said claim 35 are mounted, said carrier being mounted for rocking about an axis parallel tothe pivotal axes of said pivoted or rotatably mounted parts, and a fixed bar extending parallel to said axes in position to be encountered by the latches of all said mechanisms in the rocking movement of the carrier to disengage the latches of all said mechanisms from' the respective numeral-wheel speed-controlling levers.

' said movement.

' 48. In the construction defined in claim 42 foregoing, the means for engaging the master Wheel with the carrier, consisting of a pinion-engaging dog for resisting the rot'ation of the pinion about its axis on the carrier.

44. In the construction defined in claim .42 foregoing, the means for engaging the master wheel with the carrier consisting of a pinion-engaging dog for resisting the rotation of a pinion about its axis on the carrier, and means fixedly positioned along the path of said dog for holding the dog positively engaged with the pinion, for locking the latter against rotation through a predetermined part of the rocking movement of the carrier.

45. In the construction defined in claim 4:2,the means for locking the master against rotation, comprising a cam-controlled looking dog and a key-controlled cam for controlling the locking dog, the means for engaging the master wheel with the carrier consisting of a pinion-engaging dog for yieldingly resisting the rotation of the pinion about its axis on the carrier, and means fixedly positioned along the path of the pinion' engaging dog for holding said dog positively engaged with the pinion to positively lock the pinion against rotation through a predetermined part of the carriers rocking movement, the master-locking dog, and the dog-controlling cam being formed and positioned for releasing the master-locking dog at said part of said rocking movement. V

Y 46. Ina construction such as defined in claim 42 foregoing, the means for locking the master against rotation comprising a cam-controlled locking dog, and dog-controlling cams of graduated extent from one to' nine for controlling according to the digit to be added, the duration of the locking of the master.

47. In the structure defined in claim 14 foregoing, the master gear being circular and the carriers movement being a rocking movement about the axis of the master gear, the means for locking the master gear and carrier together being a pinion-loclting dog, and means for holding said "dog positively engaged with the pinion to prevcntthe rotation of the latter about its axis.

48. In a device for the purpose indicated, in combination, a plurality of mechanisms characterized as defined in claim 14, the master gears in said mechanisms being circular and the movementof'the carriers being a rocking about the axis ofthemaster gear, said plurality of mechanisms being assembled side by side with said master gears co-axial, the means for locking the master gear and carrier together, being in each mechanism a pinion-locking dog; having an abutment to be encountered for setting it in looking position, each of said mechanisms having a carrying means cooperating with the'numeral-wheel-rotating means of the next succeeding mechanism, and a fixed plate having a pinion-locking projection which extends through an arc in the path of said abutment'beyond the movement for adding nine corresponding to as many steps of numeral wheel rotationas there are side by side mechanisms, said projections on the plates of the "successive mechanisms having interruptions corresponding in extent toone unit step of the rocking movement, located as many steps beyond the limt of the nine steps for addition, as the column to which the mechanism corresponds is removed from the unit 100 column; whereby the carrying from column to column is permitted successively after the addition made in the respective columns.

49. Ina device for the purpose indicated, in combination with a supporting frame, a 105 carrier mounted for rocking about an axle,

a pinion journaled ,on the carrier 'eccentri cally thereof, a master gear with which the pinion is meshed, co-axial with the carrier, means for locking the master gear to the 110 frame, means for locking the master gear to the carrier, a numeral wheel actuated by the pinion and making its full'rotation in steps whose'number is a multiple of ten, a

group of nine cams whose cam lengths are graduated from one to nine, adapted to be individually set for controlling the means for locking the master to the frame, and means for so setting the cams individually.

50. In the construction defined in claim 45 foregoing, the means for locking the master to'the carrier being a dog for locking the pinion against rotation about its axis, whereby it is held in fixed relation'to the master with which itis meshed, an abutment on said dog, and a guide for the abutment in the path in which it is carried by the rocking of the carrier,said guide being shaped to hold the dog in pinion-locking position at the limit of the angular movement of the carrier corresponding to the arc occupied by the cam which controls the means for locking the master to the support.

51. In a structure for the purpose indicated, in combination, a plurality of mechanisms each constructed as defined in claim 45 foregoing, arranged side by side, the means' for locking the master to the frame in each of said mechanisms being a locking dog, said dog having an abutment projecting toward the preceding mechanism, each preceding mechanism comprising a cam for encounter with said abutment, and means moving with the numeral wheel for actuating said cam at each tenth step in the revolution of the numeral wheel.

52. In a structure for the purpose indicated, in combination, a plurality of mechanisms as defined in claim 45 foregoing, arranged side by side, the means for locking the master to the frame by meansof said mechanism, said mechanism being a dog, said dog in each of said mechanisms after he first having an abutment projecting toward the preceding mechanism, each preceding mechanism comprising a cam for encounter with said abutment, means moving with said numeral wheel for actuating said cam at each step in the revolution of the numeral wheel, said sam and abutinents being relatively positioned in the respective mechanisms for encounter successively at intervals of a single step of the numeral wheels, the first encounter being after the nine cams have been passed inthe rocking movement by the cooperating abutment.

53. In a device for the purpose indicated, in combination with a supporting frame. a carrier mounted for rocking about an axis, a pinion journaled on the carrierecventrically thereof; a master gear with whic the pinion is meshed co-axial with the c .er, means for locking the master to the name, means for locking the master to the carrier, :1 numeral wheel actuated by the pinion and making a full revolution in steps whose number is a step multiple of ten; means for holding the master gear locked to the carrier and unlocked from the frame at a selected rest or initial position of the carrier, manually operable means on the carrier and cooperating means on the frame for locking the master gear to the frame, adapted to so lock it through varying portions of the angular movement ofthe carrier from rest position in the direction for advancing the numeral wheel for adding, and means on the carrier for displacing said cooperating means on the support to terminate their coo eration for locking the master at the end of the advance or adding stroke of the carrier; whereby the return movement of the carrier to rest position is made with the master unlocked from the support.

In a device for the purpose indicated,

in combination with a supporting frame, a carrier mounted for rocking about an axis, a pinion journaled on the carrier eccentrically thereof, a master gear with which the pinion is meshed co-axial with the carrier, means for locking the master to the carrier, a numeral wheel actuated by the pinion and making a full revolution in steps whose number is a multiple of ten, manually-operable means on the carrier and cooperating means on the support for controlling the locking of the master gear to the frame, adapted to so look it through varying portions of the angular movement of the carrier from rest position in the direction for advancing the numeral wheel for adding,

and means on the carrier, independent of' said manually-operated means, for cooperating with the means on the support for looking the master gear, by the movement of the carrier from rest position in the reverse direction; whereby the numeral wheel is re versely rotated upon such reverse movement of the carrier.

In the construction defined in claim 54, foregoing, said independent means for locking the master to the support being yielding, the numeral wheel having means for positively arresting its rotation in the reverse direction at the zero point, whereby said reverse rotation of the carrier carries the numeral wheel back to zero and no farther, and the carrier is permitted to make a full stroke in said reverse direction without regard to the number of steps through which the numeral wheel is to be reversed to reach zero position.

56. In the construction defined in claim 54:, foregoing, means on the frame for displacin the co iperating means on the support by which the master gear is locked to the support during said reverse movement of the carrier from rest position, to terminate said locking, and an abutment on the carrier positioned for encountering said displacing means at the limit of said reverse movement of the carrier, whereby the return of the carrier to rest position is made without rotating the pinion and the numeral wheel.

.37. In the construction defined in claim 5%, the means for locking the master to the frame being a dog on the frame having an abutment movable on the (log to encounter or avoid the cooperating means on the carrier, and means on the carrier for moving said abutment to the position for avoiding said encounter to so move it during the latter part of the carriers movement in the direction for adding, and after it has moved the entire nine steps for adding.

58. In the construction defined in claim 54, the means for locking the master to the frame, comprising a dog on the frame, an abutment-carrying arm pivoted to the dog,

a latch for holding the same arm positioned on the dog at cam-encountering pos1t1on of the abutmentya releasing device on the carrier ositioned for encounterin the latch todisengage it, and means for encountering the abutment-carrying arm to move the abutment out of cam-encountering position,

' said releasing device being positioned for frame, being a dog on the frame, an abutment-carrying arm pivoted to the dog, a latch for holding the said arm stopped on the dog at cam-encountering position or the abutment, a releasing device on the carrier, comprising a cam for encountering the latch to disengage it from the abutment carrying I arm, and hold it disengaged, and a second cam positioned for encountermg the abut- ]ment on the said arm to move the arm out of cam-encountering position, said cams being positioned for making their respective encounters; during the latter part of the stroke of the carrier in adding direction after it I has moved the entire nine steps for adding,

the means for locking the master to the frame, being a dog on the frame having an abutment movable on the dog to encount r or avoid the coiiperating means on the carrier, an arm pivoted on the dog for carrying said abutment and means on the carrier positioned for encountering said arm to move it to cain-enccunte ing position of the abutment in the concluding part of the carriers reverse movement to initial position, and a spring operated latch forengagmg it to lock it on the that position.

61. In the construction defined in claim 54: the means for locking the ma r to the frame being a dog on the frame having an abutment movable on the dog to encounter or avoid the cooperative means on the carrier; an arm pivotet on. the cog for carrying said abutment movable; a catch to lock the abutment-carrying arm at position for encounter with the cooperating means on the carrier; a lever on the support for releasing said catch and means on the carrier for operating said last mentioned lever positioned for operative encounter therewith in the concluding part of the carriers reverse movement beyond. rest position.

62. In a structure for the purpose indicated a master gear, a numeral-wheel-operating pinion meshing with the master gear, a

rarricr from see carrier for the pinion, a dog for locking the pinion against rotation about its axi on the carrier :2 thereby locking the c to the mas n s lockiich the ma l senga od from the master n of rest 0'? the carrier; yielding engaging the dog with the master upon reverse movement of the "e position; means for positively stopping t.

ue reverse movement of the pinion at zero position of the numeral wheel, thereby at the position locking the master to the carrier in said reverse movement; an abutment mounted movably on the master-locking dog which said yielding means encounters for engaging the dog with the master, said engagement being effected by the head of the dog meshing between con secutive gear teeth of the master, and said head being adapted to be crowded out of said i engagement by positive rotation of the master, and means by which the yielding of the locking do displaces the abutment from operative position for holding the dog engaged with the master; whereby after a single step of forced movement, the reversal of the carrier beyond zero position of the numeral wheel is made with the master wheel unlocked.

63. In the structure defined in claim 62 foregoing, the means for movable mounting of the abutment on the locking dog, being a lever carrying the abutment pivoted to the dog, and a catch pivoted on the dog for locking the lever in operative position of the abutment; the means for displacing the abutment from operative position being an abutment on the carrier, and means encountered by said abutments in the movement of the carrier adapted by such encounter to be pinion meshing with the master; a carrier for the pinion mounted for carrying the pinion back and forth along a path conformed to the master; means for controlling the locking and releasing of the master with respect to the supporting structure, and manual keys for setting toe controlling means, mounted for movement with the carrier.

65. In the construction defined in claim 64 foregoing, means for locking the pinion with respect to the carrier; and connections between said parts for simultaneously releasing the master from the supporting structure.

66. In a mechanism for the purpose inclicated, in combination with a supporting structure, a numeral Wheel, means for rotating it consisting of a master mounted on a supporting structure, means for releasably looking it fixed thereto and a pinion meshing with suid master; a carrier for the pinion mounted for movement to carry the pinion hawk an l forth along a path conformed to the master; manual keys mounted for nmvement bodily With the carrier, and means operutml 2 said keys for wontrollins: 10 the lockingand releasing of the master.

In testimon whereof, I have hereunto set my hand (it Chimg'o, this 20th day of May,

GEORGE BROWNING. 

